Rotary ventilator



May 23, 1933. T. A. WEISENBORN ROTARY VENTILATOR Filed May 51, 1950 T/zeodore A. VL isenbam A TTORNE Y.

or and Patented May 23, 1933 UNITED STATES PATENT- OFFICE THEODORE A. WEISENBORN, OF WICI-IITA, KANSAS, ASSIQ-lg' OR TO JAMES W. DRUMMON'D AND GEORGE S. D'RUMMOND,

BOTH or wr'cnrre, KANSAS ROTARY VENTILATOR Application filed May 31,

This invention relates to an improvement in ventilators.

The object of this invention is to produce a ventilator having a rotary top which is supported over the exhaust pipe withoutany obstruction in the exhaust pipe.

Another object is to produce a ventilator of the kind described which is noiseless in its operation of turning its top.

Another object of this invention is to produce a ventilator of the kind described which has a high exhausting capacity.

These and other objects will be more fully explained as this description progresses.

Referring to the drawing, Fig. 1 is a front view of the ventilator. Fig. 2 is a side View of the ventilator. Fig. 3 is a sectional view through the ventilator. Fig. 4 is a plan view of the ventilator. Fig. 5 is a plan view of the ventilator having the rotary top and bearing removed. Fig. 6 is a cross sectional view of the ventilator taken along the line VIVI in Fig. 3.

In the drawing is shown an exhaust pipe 10, having a plurality of air deflectors 11 on the outside thereof. At 12 is shown supports for a stationary flat top plate 13 and a bearing spider 1 1, the legs of said spider resting on and being rigidly attached to the supports 12. At 14 is a spindle rigid with the spider 14 and on which is mounted a tube 15 on ball bearings 16 and 17, said tube and bearings being adjustably held in place by the nuts 18 which are threaded on the spindle 14. Rigidly mounted on the tube 15 is a cone 19 and a brace plate 20, also rigidly attached to the tube 15. At 21 is a skirt, the upper end of which is riveted to the cone 19 and brace plate 20, substantially as shown in Fig. 3. At 22 is an opening in the skirt 21 there being a. hood 23 and outwardly projecting side walls 24 and 25 around the opening 22, the skirt 21 is larger in diameter than the exhaust pipe 10 and the lower end of the skirt 21 drops below the upper end of the exhaust pipe 10 so that an equal space exists around and between the lower end of the skirt and the upper end of the exhaust pipe. At equally spaced intervals around the exhaust 1930.- Serial No. 457,856.

said air deflectors extending to theupper edge of the exhaust pipe 10 and being narrow enough, as shown at 26, to go between the'lower end of the skirt 21 and the upper end of the exhaust pipe 10 and leave a clear-' ance between the skirt .21 and the portion 26 of the'air deflector 11 so that the skirt 21 mayturn freely without contacting the portion 26 of the air deflector 11.

This construction producesduct like for mations between the walls of the air deflectors and the'lower portion of the skirt 21 and the upper end of theexhaust pipe 10, the object of which is as follows: Air striking between the deflectors 11 will have to travel either up or down to make way for the. air coming behind it and in traveling upward, it must pass through the ducts 27 and be discharged within the skirt 21 at the top of the exhaust pipe 10 and pass out through the opening 22 in the skirt 21, during which operation it tends to form a vacuum over the exhaust pipe 10 which must be filled with air which is pulled through the exhaust pipe 10 by reason of the said vacuum and the air coming through the exhaust 10 as well as that coming through the ducts 27 will exhaust through the opening 22 in the skirt 21 which produces the desired ventilation. Attention is drawn to the fact that there are no air obstructions in the exhaust pipe 10 and skirt 21, so that exhausting air may pass uninterfered with through the exhaust opening 22 in the skirt 21, mak ing it possible to use a smaller size ventilator of this design than can be used in other types of rotary ventilators having bearing support obstructions and the like in the exhaust pipe, which restrict the free passage of air. At 30 is a cap housing over the nuts 18 and the bearings 16, said cap being rigidly attached to the cone 19. At 28 is a vane rigidly attached to the top member 19, said vane being in center alignment with the opening 22 and on the same side of the ventilator as the opening 22, so that the rotary skirt will always be revolved by the wind so that the opening 22 in the skirt 21 will face the direction in which the wind is traveling.

Such modifications may be employed as lie within the scope of the appended claim, Without departing from the spirit or intention of the invention. V

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: y Y

In a rotary ventilator of the kind described, the combination of an exhaust pipe, perpendicular supports rigidly attached to the walls of said exhaust pipe, a stationary flat closure plate supported on theupper ends of the said supports and a spider and spindle thereon, said spider being rigidly attached to said support member, hearings onsaid spindle and a cone and brace plate rigidly attached to said bearing structure, said cone and brace platesupporting a skirt and a vane, one side of said skirt being open for the free passage of air,the lower end of said skirt enveloping the upperend of said exhaust pipe, air deflectors, said air ,defiec-' tors being rigid with and radially projecting from the said exhaust pipe, the upper ends of said air deflectors extending to'the upper edge of the said discharge p1pe and being positioned between the upper end of the discharge pipe and the lower end of the said skirt substantially as shown and for the purpose described. 7 I

In testimony whereof I aflix my signature.

THEODORE A. WEISENBORN. 

